Method of making wheel plates



Feb. 17, 1942.

E. H. PlRoN METHOD 0F' MAKING WHEEL PLATES Filed March 9, 1959 /W///A//VV/V/vvw AIl wh m.. .,AAA/AnA/nn.. l/, W

Irl/7 NV ENT OR 7:7/10

ATTORNEY BY, I'.

Patented Feb. 17, 1942 2,273,620 METHOD F MAKING PLATES Emil H. Piron,rNew York, N. Y., assigner to Transit -Research'Corporatiom a corporation of New York i' UISQJITi-:l'iY -sTmss PATENT OFFICE Application March 9, 1939, Serial No. 260,812

` 1 claim. (ci. .es-16s) This invention relates -te rau wheels and the method of making same and has for its object to provide a tire and tire carrying plate for a resilient wheel of improved construction which can be made at a substantial saving in cost.

In resilient wheels of the type wherein a tire carrying plate supports its wheel hub through resilient elements acting in shear it is desirable to employ a tire having long lasting qualities whereas the plate radiating inwardly thereof may and preferably is of heavy sheet metal construction which need have no 'particular friction 'resisting qualities. An object of this invention is l to provide a tire and tire carrying plate off separately chosen materials and separately fabricated of such construction that they may be joined t0- gether without the necessity of a machining operation on either thereof.

More particularly it is an object te provide a tire and tire carrying plate designed for con.

centric fitting to an accuracy such as may be expected in a tire made by rolling and to secure the parts together, preferably by welding.

lOther objects and advantages will'beeome more fully apparent as reference is had tothe accom-` panying drawing wherein my invention is'illustrated, and in which:

Fig. l is a plan of the tire and plate indeiring meanswith a tire and plate assembled therein,

Fig. 2 is a section taken on the line 2-2 of` Fig. 1, and

Fig. 3 is a vertical section of a wheel.

-Referring to Figs. 1 and 2, I designatesa fix-i ture having a central support 2 with means 3 for clamping a plate 4 thereon with its central opening 5 accurately located -with respect to the center of the fixture' and withv the main portions of the plate located in a plane exactly parallel to plate have no part in the function of centralizing the tire with respect to the-plate. Said surfaces may be of uncertain dimensions and ,irregular form and, therefore, require no machining or nishing operations.

After assembly of the tire and plate as above described the'two elements are assembled in a wheel 'structure such as shown in Fig. 3, and which comprises a hub II having spaced plates I2' and f3 radiating outwardly therefrom. 'I'he plate i2 is ilxed with respect to the hub II and the plate I3 is fixed with respect to a sleeve I4 which is secured on the hub by a 'nut I5. 'I'he tire supporting .plate 4 radiates inwardly between the two plates I2 and I3, and is supported from the plates I2 and 3i by means of rubber I8 in shear. The masses I 8 of rubber have discs Il surface bonded thereto and retained with respect through the elastic masses I6 to the plates I2 the bottom surface of the-fixture. The plate 4 is provided with a peripheral flange 1 and is, therefore, cup-shaped.

A tire '3, provided with an exactly circular exterior, is placed in the fixture and rests upon the surface 8. Thesurface 3 supports the tire in a plane exactly parallel to the plane of the main portion of the plate 4, and adjustable elete'rior surface exactly concentric with the open- .ing 5 in the plate 4. The plate and the tire are then welded. together as indicatedat Iii, while they are maintained inthe above described relationship. As may be seen in Fig. 2 the inner diameter of `ments 3 engage and hold the tire with its exand I3 and the hub II.-` The welds I0 may be spaced apart as shown in Fig. 1 to provide air gaps Il between the tire l and the plate 4. The

transfer of heat, generated by brake shoes con.

tacfting the tire, from the tire to the plate is thus reduced, with the result that the elastic masses are less likely to be damaged by such heat.

Although a speciilc embodiment of the inven.

tion is illustrated and described, it will be understood that various changes may be made 'v lthin the scope of the appended claim without departing fromthe spirit of the invention, and such changes are contemplated. .v

What is claimed is:

The method of making a tire and tire carrying plate for a resilient wheel which consists in forming a metallic tire, in placing in said tire av at round metallic plate having an annularrim portion of suilicientlydess diameter than the inside diameter of said tire'to provide a substantial gap therebetween, and in'welding said plate at opposite sides said rim portion to said tire, the welds being spaced both laterally and circumferentially whereby substantial portions of said gap are unobstructed an'd facilitate circulation of air both laterally between circumferentially lspaced weldsl and circumferentiallybetween the laterally spaced welds said plate having a central opening therethrough concentric with said tire variations in the sizes of said welds.

` w .EMIL H. PraoN. 

